Abstract:
:The malformation of inverse cerebellum and occipital encephalocele is situated morphologically between the Arnold-Chiari and Dandy-Walker malformations. In the three reported cases, hydrocephalus was not present, concomitant malformations of the lamina terminalis were present in two, and polymicrogyria was found in all three. The primary defect in the malformation is a complex occipital encephalocele composed of miniature hemispheres connected to the brain stem by an extension of the midbrain tectum. The cerebellar folia extend ventrally and cover the basilar artery. We propose that the encephalocele arises through the processes of overgrowth and dysraphism and thus falls into the organogenetic malformations of Yakovlev. Supporting this theory is the consistent observation of the duplicate hemispheres in the encephalocele and the hydromyelia in the examined spinal cords.
journal_name
Neurologyjournal_title
Neurologyauthors
Smith MT,Huntington HWdoi
10.1212/wnl.27.3.246subject
Has Abstractpub_date
1977-03-01 00:00:00pages
246-51issue
3eissn
0028-3878issn
1526-632Xjournal_volume
27pub_type
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